Authenticator persistance

Hi,

in the readme of webauthn4j, you wrote something like

save(authenticator); // please persist authenticator in your manner
Authenticator authenticator = load(credentialId); // please load authenticator object persisted in the registration process in your manner

I’m fine with that, but I failed to find a way to serialize and deserialize Authenticator instances. I tried several ways, using Jackson, converters, etc, but while serialization works, deserialization does not work 😕

All the following examples fails :

val bytes = new CborConverter().writeValueAsBytes(authenticator)
println(bytes)
val auth = new CborConverter().readValue(bytes, classOf[Authenticator])
println(auth)

or

val json = new JsonConverter().writeValueAsString(authenticator)
println(json)
val auth = new JsonConverter().readValue(json, classOf[Authenticator])
println(auth)

or

val module = new com.webauthn4j.converter.jackson.WebAuthnJSONModule(new JsonConverter(), new CborConverter())
val mapper = new ObjectMapper().registerModules(module)
val json = mapper.writeValueAsString(authenticator)
println(json)
val auth =  mapper.readValue(json, classOf[Authenticator])
println(auth)

can you explain what i’m doing wrong ?

Thanks

[ynojima]

credentialId is less than 1024 bytes. attestedCredentialData is normally less than 1024 bytes attestationStatement has no size limit, but normally less than 16384 bytes. client extensions JSON size has no size limit. authenticator extensions also has no size limit.

[sergeev1chvn]

@ynojima thx, enough 30_000 varchar